2212 Hephaistos (1978 SB)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8346603000
Semi-major axis (a)2.1675877000 AU
Inclination (i)11.20255000°
Long. of Asc. Node (Ω)26.56556000°
Arg. of Perihelion (ω)210.46301000°
Mean Anomaly (M)308.24302000°
Mean Motion (n)0.3088439100°/day
Perihelion dist (q)0.35838830 AU
Aphelion dist (Q)3.97678710 AU
Orbital Period3.19128080 yr
Physical Parameters
H (abs. magnitude)13.45
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.730″
Uncertainty0
Orbit TypeApollo
MOID0.111922 AU
Observations Used4548
Oppositions39
Arc Total1978-2026
First Observation Used
Last Observation Used2026-03-22
Observations (4672)
Date Type RA Dec Mag Band Observatory
2024-12-31 15:22:28 C 03 00 55.01 +25 14 47.2 V D29
2025-01-01 14:47:57 C 03 00 21.47 +25 11 18.8 V D29
2025-01-01 15:08:19 C 03 00 20.98 +25 11 15.7 V D29
2025-01-01 15:28:41 C 03 00 20.50 +25 11 12.7 V D29
2025-01-02 04:09:50 C 03 00 02.999 +25 09 21.35 V G96
2025-01-02 04:17:15 C 03 00 02.822 +25 09 20.20 V G96
2025-01-02 04:24:41 C 03 00 02.650 +25 09 19.08 V G96
2025-01-02 04:32:06 C 03 00 02.466 +25 09 18.00 V G96
2025-01-04 05:10:24 C 02 58 58.676 +25 02 21.20 X F52
2025-01-04 05:27:02 C 02 58 58.314 +25 02 18.90 X F52
2025-01-04 05:43:46 C 02 58 57.949 +25 02 16.55 X F52
2025-01-04 06:00:34 C 02 58 57.586 +25 02 14.18 X F52
2025-02-26 02:53:03 C 03 01 19.585 +23 59 02.08 V V00
2025-02-26 03:01:14 C 03 01 19.758 +23 59 02.26 V V00
2025-02-26 03:09:19 C 03 01 19.916 +23 59 02.65 V V00
2025-02-26 03:17:23 C 03 01 20.082 +23 59 02.90 V V00
2025-08-16 13:39:46 C 06 02 23.892 +30 44 40.67 V T08
2025-08-16 13:51:46 C 06 02 24.398 +30 44 42.72 V T08
2025-08-16 13:53:46 C 06 02 24.468 +30 44 42.36 V T08
2025-08-16 14:03:46 C 06 02 25.027 +30 44 43.69 V T08
2025-08-16 14:05:46 C 06 02 25.090 +30 44 43.48 V T08
2025-08-16 14:15:46 C 06 02 25.567 +30 44 44.99 V T08
2025-08-16 14:17:46 C 06 02 25.709 +30 44 45.31 V T08
2025-08-28 14:02:44 C 06 16 03.874 +31 07 17.47 V T05
2025-08-28 14:14:41 C 06 16 04.387 +31 07 18.48 V T05
2025-08-28 14:26:38 C 06 16 04.939 +31 07 19.45 V T05
2025-08-28 14:38:35 C 06 16 05.446 +31 07 20.57 V T05
2025-09-25 13:40:05 C 06 43 53.887 +32 10 28.56 V T05
2025-09-25 13:44:41 C 06 43 54.084 +32 10 28.42 V T05
2025-09-25 13:54:00 C 06 43 54.408 +32 10 29.75 V T05
2025-09-25 14:08:43 C 06 43 55.001 +32 10 31.15 V T05
2025-09-26 02:51:52 C 06 44 21.905 +32 12 00.14 V R17
2025-09-26 03:12:15 C 06 44 22.637 +32 12 01.04 V R17
2025-09-26 03:32:36 C 06 44 23.326 +32 12 04.57 V R17
2025-09-26 03:53:00 C 06 44 24.060 +32 12 06.70 V R17
2025-09-29 14:00:11 C 06 47 12.559 +32 22 06.74 V T05
2025-09-29 14:04:10 C 06 47 12.629 +32 22 06.38 V T05
2025-09-29 14:11:57 C 06 47 13.013 +32 22 07.39 V T05
2025-09-29 14:28:07 C 06 47 13.452 +32 22 09.19 V T05
2025-09-30 13:36:31 C 06 47 59.191 +32 25 05.81 V T05
2025-09-30 13:41:05 C 06 47 59.328 +32 25 05.95 V T05
2025-09-30 14:15:16 C 06 48 00.401 +32 25 11.21 V T05
2025-09-30 14:23:08 C 06 48 00.696 +32 25 12.79 V T05
2025-09-30 14:46:58 C 06 48 01.445 +32 25 15.21 X F52
2025-09-30 14:53:37 C 06 48 01.660 +32 25 16.10 X F52
2025-09-30 15:00:20 C 06 48 01.868 +32 25 16.95 X F52
2025-09-30 15:07:03 C 06 48 02.082 +32 25 17.85 X F52
2025-10-01 13:50:15 C 06 48 46.205 +32 28 14.09 V T05
2025-10-01 13:52:12 C 06 48 46.267 +32 28 14.74 V T05
2025-10-01 13:54:56 C 06 48 46.296 +32 28 14.88 V T05